Furnace gas-burner



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J. S. ANDREWS 8v J. S4. ROGERS. PUR'NAGE GAS BURNER. No. 392,175. Patented Nov. 6, 1888.

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J.. s. ANDREWS an J. e.. ROGERS.

, FURNACBGAS BURNER. No. 392,175. Patented Nov. 6, 1888.

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J. s. ANDREWS au J. s, ROGERS. FURNAGE GAS BURNER.

No. 392.175. 'Patented Nom-6,1888.

N PETiRS. mulo-mwgrnphzr, Washington. D.c.

ATENT FFICIE.

JOI-IN S. ANDREWS, OF NEW' YORK, N. Y., AND JAMES S. ROGERS, OF ROOKPORT, MASSACHUSETTS.

FURNACE GAS-BURNER.

:SPECIFICATION forming part of Letters Patent N o. 392,175, dated November 6, 1888.

Application filed May 25, 1887.

.To @ZZ whom it may concern.-

Be'it known that we, JOHN S. ANDREWS and JAMES S. Roenes, citizens of the United States, residing, respectively, at New York and Rock'` port, in thecounties of New York and Essex and States of New York and Massachusetts, have invented certain new and useful Improvements in Furnace Gas-Burners; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap` pertains to make and use the same. i

Our invention relates to a burner and its adjuncts to be employed in a furnace where gas Ais used as a fuel, and particularlyin a furnace and with an apparatus of the character disclosed in Letters Patent No. 345,649, dated July 13, 1886, for the manufacture and utilization of gas for heating and other purposes; vand it consists in the construction, arrangement, and combination of parts, which will be more .fully hereinafter described, and pointed out in the claims.

One object of our invention is to produce a burner wherewith the gas employed as a fuel may at the point and instant of combustion be commingled with air, both the gas and the air being at the time of such commingling in a highly-heated state.

A further object is to produce by the commingling of the gas and air in a highly-heated state at the point and'instant of combustion a more perfect combustion of the gas than has hitherto been attained.

We are aware that attempts have been made 4to secure the same results, but, so far as we know, with only partial success.

We attain these objects above mentioned by the apparatus illustrated in the accompanying drawings,wherein the same letters of reference indicate the same parts, and in which- Figure l represents a horizontal sectional view of the bench or walls of afurnace, showing a flue or duct within the walls, but near the inner surface, for conducting the air to the air-chamber formed in the burner. Fig. 2 is a longitudinal vertical section of the furnace, showing the burner, the air-flucs in the walls of the furnace, and the apparatus in part for manufacturing gas. Fig. 3 is a transverse secseriai No. 239,372. (No model.)

.tion of the burner, showing the outer and inner pipes, the exit-tubes for the gas, and the supports for the inner pipe. Fig. 4 is a longitudinal section of the same on the dotted line m x, Fig. 3. Fig. 5 is a transverse section of a modified form of the burner. Fig. 6 is a longitudinal section of the same on the line :v x, Fig. 5.

In the drawings, A indicates a heating chamber or furnace,which is to be presumed as provided with the usual grate and other belongings. In the walls of this chamber or furnace vwe form an air-duct, B, which communicates with the outer atmosphere at any suitable point, the said air-duct surrounding the entire furnace within the walls of the same. Attached to and communicating with the air-duct Bis the burner C, the peculiar construction thereof being more clearly shownin Figs. 3

and 4 of the drawings. This burner consists of ,an exterior pipe, c, and a smaller interior pipe,

c', the two pipes being cast integrally or rigidly connected together by suitable studs or arms, ,and the interior pipe is so arranged within vthe exterior pipe as to leave but asmall space between the tops of the pipes, and so as to form a much largerv airfspace between the lower sides of the pipes. The upper sides of the pipes are provided with' slots c3 in the exterior pipe and cL in theinterior pipe, the said slots being preferably arranged in a zigzag or staggering manner, so as to weaken the tops of the pipes as little as possible, and the slots are connected by means of short pipes c5, having perforations c6 in their sides, forming communications between the airchamber in the exterior pipe and the short pipes c5.

By having the short perforated pipes forming exits for the gas, and by having the airentering the said short pipes through the perfo` rations in their sides, the air and gas will be thoroughly mixed, and a more thorough combustion of the latter will take place with a greater generation of heat and less formation of soot or solid carbon than by having the air and gas mix interiorly of the pipes. The modified form of burner shown in Figs. 5 and 6 is therefore less preferable, and this formis only IOO furnace. This modified form shows the exterior pipe as formed with slots c, having the short conical pipes c5 extending from the interior pipe up into said slots, ilush with the surface ot' the exterior pipe, and leaving annular or oblong spaces between the slots and the ends of said short pipes for the passage of the air. Perforations, however, are capable of being substituted for the spaces, if desired. \Ve do not make any claim for this construetion, which is merely shown as another form of burner capable of being used with the airduets7 as this form has already been patented.

Under the construction and arrangement of the parts of theapparatus as shown the operation thereof willheas follows: lhere having been started in the heating chamber or furnace and the feedpipes being sufficiently heated to decompose and couvert the fuel therein into gas, draft or suction is caused in the air-duct, and thereby the passing current of air becomes heated during its circuit of said duct, which extends around and near the inner surfaces of the walls of the chamber or furnace. rlhe heated air is now passed into the space or chamber within the exterior pipe of the burner, and in passing through the perforations of this pipe is mixed with the gas from the interior pipe, forming a blaze of intense heat.

This form of burner, in connection with the use of heated air, is especially adapted to blastfurnaces, owing to the steadiness and intensity of the flame produced thereby; also, it causes the llame to be projected to a greater extent than the ordinary burner, thereby not only greatly intensifyingI the heat in the furnace, but keeping the feed and gas pipes at the proper degree of temperature.

XVe do not restrict ourselves to the employment of a single burner constructed as described and supplied with heated air, as we contemplate the use of two or more such burners, according` as circumstances may require; nor do we coniine ourselves to the employment thereof in connection with the particular number and arrangement of feed-pipes shown and described, nor to any other precise details, as minor changes may obviously be made without departing from the principle of our invention.

\Ve are aware that it is not broadly new to mingle heated air which is heated by the fire within the furnace with the gas in the burner for the purpose of increasing the combustion of the gas, and thus intensifying the heat created, and we are also aware that it is not broadly new to construct burners in which the gas is passed out from an interior pipesurrounded by an air-pipe, the said pipes having common outlets for the gas and air, and we do not claim such a burner; but

Vhat we do claim as new isl. The combination of a furnace-chamber provided with a hot-air duct in its walls surrounding the entire chamber and being heated therefrom, and havingasuitable air-inlet, with a burner consisting of an exterior hot-air pipe connected at one end into said hot-airduct and formed with slots or apertures arranged in a zigzag line in its upper side, an interior gas-pipe having registering apertures or slots in its upper side and being arranged within said hot-air pipe, and short pipes connecting the registering apertures or slots in said gas and hot-airpipesand having perforated sides, substantially as described.

2. A burner for gaseous iluids, comprising an exterior hot-air pipe formed with slots or apertures arranged in a zigzag linein its upper side,an interior gaspi pe formed with registering apertures or slots in its upper side and arranged within said hot-air pipe to form an air-chamber larger at the bottom than at the top, and short pipes connecting the apertures or slots in said pipes, and having perforations in their sides which form communication between the hot-air chamber and the gas-ducts formed by the short pipes, substantially as and for the purpose described.

In testimony whereof we affix our signatures in presence of' two witnesses.

JOHN S. ANDREWS. JAMES S. ROGERS.

Witnesses:

Giras. E. HITCHCOCK, HENRY F. Ronssnn. 

